Mayor Mare has a plan to boost economic growth and create jobs in Ponyville. Will the Elements of Harmony all play along?

Following Twilight Sparkle's explanation of the scientific method, Diamond Tiara says the sonic rainboom is a scientific phenomenon. Scootaloo insists it is magic. The Ponyville schoolhouse is the scene for an unprecedented intellectual dispute.

Can you make a rainbow just with sunlight and water?

The further adventures of Commander Hurricane, Chancellor Puddinghead, and Princess Platinum.